Hi, all, I find that binding energy (Van der Waals) are different from Adsorption Energy determined let's say from desorption spectroscopy. If approaching from 3/2kT = eV -> then at room temperature, it's approximately 25meV. So, for adsorption to occur at room temperature, the binding strength has to be 25meV. However, I find that when scientists point to adsorption energy, the energy scale is approximately 1 order of magnitude higher? like a few hundreds of meV.